This Earth Day, three experts share tips on how to feel hopeful about the environment

image via New Scientist

April 22, 2026, 10:00 AM

• •The Clean Air Act of 1956 in London dramatically improved air quality by addressing the use of dirty coal.
• •The Montreal Protocol of 1987 led to the healing of the Antarctic ozone hole through the phasing out of CFCs.
• •The clean energy sector, particularly solar power, is rapidly expanding and becoming more economically viable.
• •Collective action and public demand are crucial for driving environmental change and achieving significant wins.

This Earth Day, three environmental experts share stories of past victories to inspire hope for the future. They discuss how London tackled severe air pollution in the 1950s with the Clean Air Act, learning from the roles of various factors, including public pressure. The experts also highlight the success of the Montreal Protocol in healing the Antarctic ozone hole, emphasizing the importance of public awareness. Finally, they point to the rapid growth of clean energy, such as solar power, as a reason for optimism, and the power of collective action.

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